and 



where 



= fv 2 sin 2 o + (V cos 6 - V J 2 V /2 ( 20 



I vm v vm vt ) 



V. and V, are the corrected voltaae amplitudes, 

 dx dy - 



V and V are the measured voltage amplitudes, 

 xm ym 



V ^ and V . are the tare voltage amplitudes, and 

 xt yt 



is the phase angle between the measured and 



tare voltages. 



Because of higher resolution, voltages read from the digital voltmeter 



were used in the data analysis rather than readings from the Sanborn 



charts. V., and V. then were substituted into Equation (18) to obtain 

 dx dy 



the dynamic force amplitudes. 



RESPONSE RATIOS 



In the mathematical models under development to predict the dynamic 



2 

 load and motion responses of moorings, the dynamic loads may be obtain- 

 ed from non-dimensional coefficients, which follow: 



- = JL_0 (21) 



'fx u a/U 



C* ■ -*-m (22) 



fy u a/U 



27 



